Zebrafish optic chiasm

Light microscope image of an abnormal two-day-old zebrafish embryo which has been stained to show all of the nerve cell processes in the eyes and brain. This embryo has a mutation in the Noi gene causing many of the processes (axons) to get lost as they cross the midline from the eye to their target brain region. (credit: R. MacDonald & S. Wilson) Biomedical Image Awards 1998.